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<div class="section boost_icl_function_reference_interval_construction" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_icl.function_reference.interval_construction"></a><a class="link" href="interval_construction.html" title="Interval Construction">Interval
      Construction</a>
</h3></div></div></div>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
              <p>
                T
              </p>
              </th>
<th>
              <p>
                discrete<br> _interval
              </p>
              </th>
<th>
              <p>
                continuous<br> _interval
              </p>
              </th>
<th>
              <p>
                right_open<br> _interval
              </p>
              </th>
<th>
              <p>
                left_open<br> _interval
              </p>
              </th>
<th>
              <p>
                closed<br> _interval
              </p>
              </th>
<th>
              <p>
                open<br> _interval
              </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
              <p>
                Interval bounds
              </p>
              </td>
<td>
              <p>
                dynamic
              </p>
              </td>
<td>
              <p>
                dynamic
              </p>
              </td>
<td>
              <p>
                static
              </p>
              </td>
<td>
              <p>
                static
              </p>
              </td>
<td>
              <p>
                static
              </p>
              </td>
<td>
              <p>
                static
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                Form
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
                asymmetric
              </p>
              </td>
<td>
              <p>
                asymmetric
              </p>
              </td>
<td>
              <p>
                symmetric
              </p>
              </td>
<td>
              <p>
                symmetric
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <span class="emphasis"><em><span class="bold"><strong>Construct</strong></span></em></span>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">singleton</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">construct</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">T</span> <span class="identifier">construct</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> 
            <span class="identifier">interval_bounds</span>   <span class="special">)</span>
</pre>
<p>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">hull</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">span</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="keyword">static</span> <span class="identifier">T</span>
                <span class="identifier">right_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span>
                <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="keyword">static</span> <span class="identifier">T</span>
                <span class="identifier">left_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span>
                <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="keyword">static</span> <span class="identifier">T</span>
                <span class="identifier">closed</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span>
                <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="keyword">static</span> <span class="identifier">T</span>
                <span class="identifier">open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span>
                <span class="identifier">P</span><span class="special">&amp;)</span></code>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#discrete_types"><span class="bold"><strong>d</strong></span></a>
              </p>
              </td>
<td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#continuous_types"><span class="bold"><strong>c</strong></span></a>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
</tbody>
</table></div>
<p>
        The table above shows the availability of functions, that allow the construction
        of intervals. All interval constructin functins are of <span class="emphasis"><em><span class="bold"><strong>constant time and space complexity</strong></span></em></span>.
      </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
              <p>
                <span class="emphasis"><em><span class="bold"><strong>Construct</strong></span></em></span>
              </p>
              </th>
<th>
              <p>
                Description
              </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">singleton</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span>
                <span class="identifier">value</span><span class="special">)</span></code>
              </p>
              </td>
<td>
              <p>
                Constructs an interval that contains exactly one element <code class="computeroutput"><span class="identifier">value</span></code>. For all interval types of
                the icl sigletons can be constructed for <span class="emphasis"><em>discrete</em></span>
                domain types. For continuous domain types, only <code class="computeroutput"><a class="link" href="../../boost/icl/continuous_interval.html" title="Class template continuous_interval">continuous_interval</a></code>
                is capable to construct a singleton.
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">construct</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span>
                <span class="identifier">lower</span><span class="special">,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span> <span class="identifier">upper</span><span class="special">)</span></code>
              </p>
              </td>
<td>
              <p>
                Contructs an interval with lower bound <code class="computeroutput"><span class="identifier">lower</span></code>
                and upper bound <code class="computeroutput"><span class="identifier">upper</span></code>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">T</span> <span class="identifier">construct</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span> <span class="identifier">lower</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span> <span class="identifier">upper</span><span class="special">,</span>
            <span class="identifier">interval_bounds</span> <span class="identifier">bounds</span> 
            <span class="special">=</span> <span class="identifier">interval_bounds</span><span class="special">::</span><span class="identifier">right_open</span><span class="special">())</span>
</pre>
<p>
              </p>
              </td>
<td>
              <p>
                For dynamically bounded intervals this function constructs an interval
                with interval bounds specified by the third parameter.
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">hull</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span>
                <span class="identifier">x1</span><span class="special">,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span> <span class="identifier">x2</span><span class="special">)</span></code>
              </p>
              </td>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">hull</span><span class="special">(</span><span class="identifier">x1</span><span class="special">,</span><span class="identifier">x2</span><span class="special">)</span></code>
                constructs the smallest interval that contains both <code class="computeroutput"><span class="identifier">x1</span></code> and <code class="computeroutput"><span class="identifier">x2</span></code>.
                <code class="computeroutput"><span class="identifier">x2</span></code> may be smaller
                than <code class="computeroutput"><span class="identifier">x1</span></code>.
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">T</span> <span class="identifier">span</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span>
                <span class="identifier">x1</span><span class="special">,</span>
                <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;</span> <span class="identifier">x2</span><span class="special">)</span></code>
              </p>
              </td>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">span</span><span class="special">(</span><span class="identifier">x1</span><span class="special">,</span><span class="identifier">x2</span><span class="special">)</span></code>
                constructs the interval <code class="computeroutput"><span class="identifier">construct</span><span class="special">(</span><span class="identifier">min</span><span class="special">(</span><span class="identifier">x1</span><span class="special">,</span><span class="identifier">x2</span><span class="special">),</span> <span class="identifier">max</span><span class="special">(</span><span class="identifier">x1</span><span class="special">,</span><span class="identifier">x2</span><span class="special">))</span></code>. Note the differences between
                <code class="computeroutput"><span class="identifier">span</span></code>, <code class="computeroutput"><span class="identifier">hull</span></code> and <code class="computeroutput"><span class="identifier">construct</span></code>:
                
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">span</span><span class="special">&lt;</span><span class="identifier">right_open_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)</span>      <span class="special">==</span> <span class="special">[</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">)</span> <span class="comment">// does NOT contain 2
</span><span class="identifier">hull</span><span class="special">&lt;</span><span class="identifier">right_open_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)</span>      <span class="special">==</span> <span class="special">[</span><span class="number">1</span><span class="special">,</span><span class="number">3</span><span class="special">)</span> <span class="comment">// contains 2
</span><span class="identifier">construct</span><span class="special">&lt;</span><span class="identifier">right_open_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)</span> <span class="special">==</span> <span class="special">[)</span>    <span class="comment">// is empty
</span></pre>
<p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">right_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">left_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">closed</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
</pre>
<p>
              </p>
              </td>
<td>
              <p>
                For dynamically bounded intervals there are for static functions
                to construct intervals with the four interval bound types: 
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span>      <span class="identifier">itv1</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span><span class="number">0</span><span class="special">,</span><span class="number">42</span><span class="special">);</span>
<span class="identifier">continuous_interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">itv2</span> <span class="special">=</span> <span class="identifier">continuous_interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">0.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span>
</pre>
<p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <span class="emphasis"><em><span class="bold"><strong>Using the interval default</strong></span></em></span>
              </p>
              </td>
<td>
              <p>
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                <code class="computeroutput"><span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">P</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
              </p>
              </td>
<td>
              <p>
                There is a library default, for all interval containers of the <span class="bold"><strong>icl</strong></span>. The intension of the library default
                is to minimize the need for parameter specification, when working
                with <span class="bold"><strong>icl</strong></span> class templates. We can
                get the library default interval type as <code class="computeroutput"><span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">P</span><span class="special">&gt;::</span><span class="identifier">type</span></code>.
                The library default uses <span class="emphasis"><em><span class="bold"><strong>dynamically
                bounded intervals</strong></span></em></span>. You can switch to <span class="emphasis"><em><span class="bold"><strong>statically bounded intervals</strong></span></em></span> by
                <code class="computeroutput"><span class="preprocessor">#define</span> <span class="identifier">BOOST_ICL_USE_STATIC_BOUNDED_INTERVALS</span></code>
                prior to icl includes.
              </p>
              </td>
</tr>
<tr>
<td>
              <p>
                
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">right_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">left_open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">closed</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
<span class="keyword">static</span> <span class="identifier">T</span> <span class="identifier">open</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&amp;)</span>
</pre>
<p>
              </p>
              </td>
<td>
              <p>
                For template struct <code class="computeroutput"><span class="identifier">interval</span></code>
                that always uses the library default the static functions for the
                four interval bound types are also available. 
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span>    <span class="identifier">itv1</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span><span class="number">0</span><span class="special">,</span><span class="number">42</span><span class="special">);</span>
<span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">itv2</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">0.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span>
</pre>
<p>
                This works with the statically bounded intervals as well, with the
                restriction that for continuous domain types the matching function
                has to be used: 
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_ICL_USE_STATIC_BOUNDED_INTERVALS</span>
<span class="special">.</span> <span class="special">.</span> <span class="special">.</span>
<span class="comment">// library default is the statically bounded right_open_interval
</span><span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span>    <span class="identifier">itv1</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span><span class="number">0</span><span class="special">,</span><span class="number">42</span><span class="special">);</span> <span class="comment">//==[0,43) //ok, bounds are shifted
</span><span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">itv2</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">0.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span> <span class="comment">//ok. right_open matches
</span><span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">itv3</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span><span class="number">0.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">);</span>     <span class="comment">//will NOT compile
</span></pre>
<p>
                See also examples <a class="link" href="../examples/dynamic_interval.html" title="Dynamic interval">Dynamic
                intervals</a> and <a class="link" href="../examples/static_interval.html" title="Static interval">Static
                intervals</a>
              </p>
              </td>
</tr>
</tbody>
</table></div>
<p>
        <span class="emphasis"><em><span class="bold"><strong>See also . . .</strong></span></em></span>
      </p>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr></tr></thead>
<tbody>
<tr><td>
              <p>
                <a class="link" href="../examples/dynamic_interval.html" title="Dynamic interval"><span class="emphasis"><em><span class="bold"><strong>Example: Dynamically bounded intervals and the library
                default</strong></span></em></span></a>
              </p>
              </td></tr>
<tr><td>
              <p>
                <a class="link" href="../examples/static_interval.html" title="Static interval"><span class="emphasis"><em><span class="bold"><strong>Example: Statically bounded intervals, changing the library
                default</strong></span></em></span></a>
              </p>
              </td></tr>
</tbody>
</table></div>
<p>
        <span class="emphasis"><em><span class="bold"><strong>Back to section . . .</strong></span></em></span>
      </p>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr></tr></thead>
<tbody>
<tr><td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#additional_interval_functions"><span class="emphasis"><em><span class="bold"><strong>Additional interval functions</strong></span></em></span></a>
              </p>
              </td></tr>
<tr><td>
              <p>
                <a class="link" href="../interface/function_synopsis.html#function_synopsis_table"><span class="emphasis"><em><span class="bold"><strong>Function
                Synopsis</strong></span></em></span></a>
              </p>
              </td></tr>
<tr><td>
              <p>
                <a class="link" href="../interface.html" title="Interface"><span class="emphasis"><em><span class="bold"><strong>Interface</strong></span></em></span></a>
              </p>
              </td></tr>
</tbody>
</table></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 -2010 Joachim Faulhaber<br>Copyright &#169; 1999 -2006 Cortex Software GmbH<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
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